Acclaimed filmmaker Ken Burns chronicles the worst man-made ecological disaster in American history, when a frenzied wheat boom on the southern Plains, followed by a decade-long drought during the 1930s, nearly swept away the breadbasket of the nation. Menacing black blizzards killed farmersí crops and livestock, threatened the lives of their children, and forced thousands of desperate families to relocate. In this two-episode, four-hour documentary, Burns combines interviews with more than two dozen survivors, with dramatic photographs and seldom-seen movie footage, to bring to vivid life stories of human suffering and perseverance.